Operation
Version 1.0 - 2020-12-10
35
Translation of original operating instruction
GT22
EN
GT22_G
B_4
.f
m
Since the grinding wheel material is harder than the workpiece, tool steel and hard alloy steel
can also be processed.
Used grinding wheel material dissolves and new material appears on the surface of the grinding
wheel.
For good surface quality: Fine grain and hard material.
INFORMATION
The maximum peripheral speed of the grinding wheel must be higher than the peripheral speed
generated by the grinding wheel spindle.
Peripheral speed of the grinding wheel in meters per second:
(m / s) = 3.14 x D (diameter of the disc, mm) x N (spindle speed, rpm) / 60000
Abrasives and application:
Grain size:
A general grain size of a grinding wheel used for surface grinding is 36 to 60. The grain indi-
cates whether a grinding wheel is coarse, medium, fine or very fine. Grain 100-180, for exam-
ple, is a fine grain. The numbers (40, 60, 80, 120) indicate the number of meshes per 25.4 mm
length of one sieve side of a vibrating sieve. The grain mixture of the abrasives is separated by
vibrating screens according to grain size.
The higher the grit number, the finer the grinding wheel.
Designation
Code
Colour
Principal application
Abrasive brown
A (GZ)
Brown
For grinding carbon steel, generally alloyed steel, mallea-
ble cast iron, hard bronze, etc.
Especially for grinding steel without quenched and tem-
pered steel, also for rough grinding.
Abrasive white
WA (GB)
White
Grinding of hardened steel, carbon steel etc. which is no
longer intended for rough grinding.
Abrasive
monocrystal-
line
SA (GD)
White,
canary yel-
low
Grinding of stainless steel and high strength material.
Abrasive
monocrystal-
line
MA (GW)
Brown
Grinding of stainless steel and soft iron
Chrome abra-
sives
PA (GG)
Pink, mauve
Grinding of steel alloys, manganese steel etc., for very
smooth running
silicone car-
bide, black
C (TH)
Black
Grinding of iron, brass soft bronze etc., for soft material.
Silicone car-
bide, green
GC (TL)
Green
Grinding of hard metal, glass fibre reinforced plastic etc.,
high strength material.
Diamond
RVD, MBD
MP—SD
Grinding of hard metal, glass fibre reinforced plastic as
well as ceramic and porcelain material
Boron nitride
cubic
CBN
Dark brown
Grinding of steel alloys with chrome, tungsten, cobalt, low
wear material.
